Electric-lamp socket



G. FRANKEL. ELECTRIC LAMP SOCKET. LiCATlON FILED J Patented Mar.2,'1920. I 'le l ll 75m/ WITNESSES d M IMENTOR GUSTAVE FRANKEL, OF NEWYORK, N. Y.

ELECTRIC-LAMP SOCKET.

Specication of'Letters Patent.

Patented Mar. 2, 1920.

Application led January 13, 1919. Serial No. 270,814.

.To all ifi/Lona.. t may comic/rn.'

lie it known that I, GUsTAvE FRANKEL, a citizen ot the United States,residing at New York, in the county of New York and State of New York,have invented certain new andusciul Improven'ients in Electric-LampSockets, ot which the following is a specification. l

My invention relates to a double socket, ot the kind that are insertedinto a suitable elect-ric light fixture and furnish two conncctions ortwo sources of current. y

p Devices of this character are used in great quantities when it isdesired to draw a current lor a table lamp as well as 'for an ,ordinaryelectric light trom a single socket, and for a variety of otherpurposes, and numerous structures have been proposed for this purpose.

The object of my invention is to produce a double socket of greatsimplicity and cheapness that can be'qniekly manufactured and assembledand shall be very reliable in preventing cross-circuits, short circuits,and the like.

Other objects of my invention will` be set forth in the `followingrdescription and drawings which illustrate a preferred embodimentthereof. c

Figure 1 is an elevation view partially in section of my proposeddevice, and is a seetion on theline 1-1 of Fig. 2.

Fig. 2 is a section on the line 2-2 of Fig.

'1, vpart of it being in perspective.

Fig. 3 is a section on the line 3-3 of Fig. 1.

All et the sections are in the directions of the arrows on therespective lines on which the)r were taken.

The socket is made of two similar halves 1 and 2 which are pressed outof some suitable composition which is made of an insulating material,and it is preferably a poor conductor of heat. Numerous compositions ontof which the parts l and 2 can be molded or cast in suitable dies, 0r byother methods. are old and well-known in the art, so that they requireno specific mention,l as my invention is neither directed nor limited'to any specific composition. The sections or halves 1 and 2 areconnected by fa bolt 3, whose head /lis countersunk in a suitable recessin section 1. and whose nut 5 is` countei-sunkA in a like recess. Eachof the sections 1 and 2 has a recess (3 iornied therein, so that whenthey are fitted and firmly pressed the parts mains and together by meansof the bolt 3, a cavity is formed in the assembled structure.

As seen in Fig. 1, the sections .carry a projecting bridge 7 of similarinsulating material, which coperateswith the correspendingrecesses 'inthe sections so that can be accurately fitted together along the ,lineof division 8. Into this bridge 7, pins 9 are secured. during itsmolding or shaping, so'that they project into the socket portions 10 and11. These socket portions 10 bayonet recesses l2, for coperation withthe head of an ordinary bulb 14, provided with projections that tit intothe bayonet and 1l are provided with lateral sockets 12, and that formelectrical connecfv tion with the pins 9, the bulb 14 being held in `thesocket construction.

The pins 9 are connected in pairs bythe ,wires 15, which are laid in,gfroovesinv the recess so that as seen in Fig. 2, the Wires 1G whichmay contact with the metal termi# nals 17,' do not contact with wires15, and are reliably held against-forming cross cir-1 cuits.- The headof the ixtnre is provided with pins 20, for the insertlon intoa suitablebayonet socket into the'electric light fixture from which the current isdrawn. It desired, the head 21 rof the fixture, which may be called themain head portion of the device, may be made of metal in theusualnianner. The current isV drawn from the divides into two circuitsby the connections shown to the two sockets 10 and 11, so that two bulbsmay secure power from a single fixture.

by the well-known bayonet.

spo

As seen in Fig. 8, the sections 1 and 2 are recessed along their line ofunion 8 so as to hold the wires 16 permanently in proper position. Thewires 16 may be soldered or fastened in any convenient manner to theterminal' 17. l

4 ln this preferred embodiment of my invention, the entire structureconsists of three parts which can be very readily assembled.

and in which the parts are prevented .from any movement relative to eachother.

The wires 15 and 16 may be covered with insulating material if desired.

It is obvious that if desired, the bridge 7 could be permanentlyconnected to either of the sections 1 and 2 or made integral With eitherof them, and that other omissions and changes of parts can be madewithout de parting from the spirit of my invention.

I claim l. In combination, a double socket comprising two like halves,each or' these halves including a main head portion and branch socketportions, so that when the said halves are joined together, they form amain head adapted to be connected to a source of electricity and branchsockets adapted to be connected through the said main head 'to the saidsource, means for connecting the said halves together, and a bridge madeof moldable insulating material intermediate and held by the said halveswhen they are connected, thesaid bridge carrying electrical means forleading current trom the said source through the said main head to thesaid branch, sockets.

2. In combination, a double socket having two like halves, each ot saidhalves comprising branch socket port-ions made of insulating material,the said halves being connected by a main head made of metal, a bridgeof insulating material intermediate and held by" the said halves whenthey are connected, means tor connecting the said halves together, thesaid main head portions -being provided with metal pins, so that themain head can be inserted into a1 bayonet socket, metal terminalssecured at the interior of the Vsaid main head and projecting metal pinscarried by the said bridge and projecting in pairs into the said branchsockets, the said projecting metal pins being connected to the saidterminals ot the main head so as to be adapted to make a completecircuit whcn they are electrically connected, the said branch socketsbeing provided with recesses'so that a bayonet head may be securedtherein and contact with the said projecting metal pins.

.3. In combination, a double socket having two like halves, each of saidhalves comprising branch socket portions made of insulating material,the said halves being connected by a main head made of metal, a bridgeot insulating material intermediate and held by the said halves whenthey are connected, means for connecting the said halves together,v thesaid main head portions being provided with metal pins, so that the mainhead can be inserted into a bayonet socket, metal terminals secured tothe interior of the said main head and projecting metal pins carried bythe said bridge and projecting` in pairs into the said branch sockets,the said projecting` metal pins being connected to the said terminals ofthe main head so as to be adapted to make a complete circnit when theyare electrically connected, the said branch sockets being provided withrecesses so that a bayonet head may be secured therein and contact withthe said projecting metal pins, the part of said bridge intermediate thesaid socket portions being at right angles to the line of divisionbetween the said halves, and the other parts ot the said bridge beinginclined te the said line of division.

41 In combination, a double socket having two like halves, each. of saidhalves comprising branch socket portions made of insulat` ing material,the said halves being connected by a main head of metal, and a separatebridge made ot insulating material and adapted to be placed intermediateand to be held by the said halves when they are connected,`and means forconnecting the said halves together, the said bridge having electricalconnecting means adapted to place the said main head portion inelectrical communication with the said branch sockets when the structureis assembled.

In testimony whereof I hereunto aiiix my signature.

' GUSTAVE FRANKEL.

